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throw TypeError in strict mode if set trap doesn't return true #10

samthor opened this Issue Mar 27, 2016 · 3 comments


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samthor commented Mar 27, 2016

let strictMode = (function() { return !this; })();

See MDN.


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samthor commented Mar 27, 2016

We need to be able to work out whether the calling code is in strict mode. It's possible under some limited circumstances, but seemingly not always.


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studentIvan commented Nov 1, 2016



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Nathan-Schwartz commented Nov 2, 2016

I can give it a shot. I plan to use the same strictMode check that @samthor posted. I am not aware of any edge cases where it would fail, but I could be mistaken.

I noticed that the specs don't seem to define a specific TypeError message for this case. Any preference there? I'm imagining something along the lines of 'handler.set: Assignment failed in strict mode'.

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